From Joomla! Documentation
The "API15" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
JText is a text handling class. JText allows the developer to specify text-fragments in the source-code, which will be translated into the site's language during runtime.
|_||Translates a string into the current language|
|sprintf||Passes a string thru an sprintf|
|printf||Passes a string thru an printf|
jimport( 'joomla.methods' );